Overview
The FSD-RD series employ “true round” damper construction where the “sleeve” is integral to the frame of the damper. These dampers are the ideal choice when round duct is used on a project. All true round fire/smoke dampers are tested to 2000 FPM and 4” WC. True round FSDs are only available in 1.5 hour fire ratings and either Class 1 or Class 2 leakage ratings.
Product Features
- UL listed and tested to UL 555 Standard for Fire Dampers
- California State Fire Marshall (CSFM) listed
- New York MEA listed
- Dynamic rated (for HVAC systems that keep fans on during a fire)
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